35 . 



Tree No, 4"): Diameter, lo inches; near infested trees. October 1, in normal 

 condition. 



Of the four trees i^irdled here May ;*!). three were infested by Dendroctonus .lune 

 19, this beimi: the first new work of the season observed. Some of the galleries 

 were then 2 inches long. They had numerous eggs, and one ventilation hole was 

 observed started, but not through. The beetles in the galleiies in some cases were 

 both black, and in others both bronze, or one bronze and one blaci. 



In order to get further information in this locality, a half acre was laid out by 

 1,'uess, which included all the girdled trees as well as the dead ones and those 

 infesteil last year. All of the trees were examined and their local relations to the 

 probable source of infestation noted on June 19. The conditions were again 

 studied on October 4, and the resu ts are given below. All trees 10 inches or less 

 in diameter standing on the half acre are omitted. 



Conditiuii uf trees, over W liickes in dianieter, on one- half acre of land. 



Killed in 1899, infested with Dendroctonus 



pupte, etc. 

 Killed in 1899; infested with pupiw and 



beetles. 

 Killed probably in 1898.. 



Killed two or three years ago 



Attacked last year, but not this; leaves green, 



but wood and bark drying. 

 Hack-girdled; attacked by Dendroctonus. 



(Tree No. i. Group II. I 

 Two roots extending into road damaged; 



attacked by Dendroctonus. 

 Attacked by Dendroctonus 



Probably infested last year and again this; 



bark dead on one side. 

 Girdled through sapwood; not attacked. 



(Tree Ko. 7. Group II. ) 

 Attacked by Dendroctonus last year; not 



again this; strip of bark and wood on one 



side dry; top green. 

 Attacked last year: infested with beetles 



and pupae; no fresh infestation; part of 



wood dry; top green: Xyloterus in roots. ■ 

 Attacked last year, but no work of larvae; 



not attacked this year. 

 Belt-girdled: attacked. (Tree No. 6, Group 



II.) 

 Hack-girdled; attacked. ( Tree No. .5, Group 



II.) 

 Hollow at ba.se; small crown; lightly at- 

 tacked. 

 Attacked this year .._ ._ 



Not infested 



do 



....do 



do 



do. 



do 



do 



do 



...do 



do... 



Fine thrifty tree 



A heavy-crowned tree . 



Living 



Not attacked 



Sapwood brown and soft. 



Sapwood brown, streaked and softening. A 



few Polyporus on bark. 

 Sapwood on one side rotten: remainder 



brown and softening; Polyporus on bark. 



Leaves fallen; wood and bark dry. 



Leaves all fallen: wood and bark drying. 



Wood dry; leaves falling. 



Majority of leaves fallen; wood dry and 



browning. 

 All dead; leaves fallen; sapwood browning. 



Wood drying without stain; 8 Dendroctonus 



gallerieb without progeny. 

 Not attacked: living baric covering .scars; 



leaves still green. 



Previously dead wood decaying: leaves yel- 

 low and majority fallen. 



Not attacked: old scars healing. 



i Dead; leaves nearly all lallen. 



Majority of leaves down. 



Larvae and pu]);i' of Dendroctonus abun- 

 dant. 

 Dying all around, leaves nearly all fallen; 

 infested by Dendroctonus and Tetropiuni. 

 Not infested. ' 



Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Attacked and killed; leaves fallen; stri])s of 



wood browning. 

 Infested; many Dendroctonus galleries, Imt 



no eggs nor larvae; leaves not fallen. 

 Abundantly infested by Dendroctonus, 



mainly in pupa stage; leaves not fallen. 

 Abundantly infested; bark dry all around; 



leaves ni)t fallen. 

 Not attacked. 



